// /src/pages/hot/hot.vue
<script setup lang="ts">
import { getHotRecommendAPI } from '@/services/hot'
import type { HotResult, SubTypeItem } from '@/types/hot'
import { onLoad } from '@dcloudio/uni-app'
import { ref } from 'vue'

// 热门推荐页 标题和url
const hotMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '新鲜好物', url: '/hot/new' }
]
// uni-app获取路由参数
const query = defineProps<{
  type: string
}>()
// 请求参数
let params = {
  pageSize: 10, // 每页条数
  page: 1 // 页码
}
// 是否显示正在加载中
const isLoad = ref(true)
// 存储当前是否处全部下拉加载完毕
const topLoad = ref(false)
// 获取点击类型
const currHot = hotMap.find((v) => v.type === query.type)
// 动态设置标题
uni.setNavigationBarTitle({
  title: currHot!.title
})
// 渲染数组
const hotData = ref<HotResult>()
// 存放子数组数据
const childrenList = ref<SubTypeItem>()
// 当前要渲染的子项索引
const childrenListIndex = ref(0)
// 请求数据函数
const getHotRecommendData = async () => {
  topLoad.value = true
  const res = await getHotRecommendAPI(currHot!.url, params)
  hotData.value = res.result
  // 判断是否全部加载完毕
  if (
    params.page >=
    hotData.value!.subTypes[childrenListIndex.value].goodsItems.pages
  ) {
    isLoad.value = false
    return uni.showToast({ title: '没有更多了！' })
  }
  // 默认第零项
  if (!childrenList.value) {
    childrenList.value = hotData.value!.subTypes[0]
  } else {
    // 合并数据
    childrenList.value.goodsItems.items.push(
      ...hotData.value.subTypes[childrenListIndex.value].goodsItems.items
    )
  }
  params.page++
  topLoad.value = false
}
onLoad(() => {
  // 调用请求函数
  getHotRecommendData()
})
// 当前高亮类型
const activeType = ref(0)

// 切换渲染类型
const changeType = (index: number) => {
  activeType.value = index
  // 提取当前点击的项
  childrenList.value = hotData.value!.subTypes[index]
}

// 触底时触发
const topLoadFn = async () => {
  if (topLoad.value) return
  topLoad.value = true
  getHotRecommendData()
}
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="hotData?.bannerPicture"></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <text
        class="text"
        v-for="(item, index) in hotData?.subTypes"
        :class="{ active: index === activeType }"
        :key="item.id"
        @tap="changeType(index)"
        >{{ item.title }}</text
      >
    </view>
    <!-- 推荐列表 -->
    <scroll-view scroll-y class="scroll-view" @scrolltolower="topLoadFn">
      <view class="goods" v-if="childrenList">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in childrenList.goodsItems.items"
          :key="goods.id"
          :url="`/pages/goods/goods?id=${goods.id}`"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.desc }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text" v-if="isLoad">正在加载...</view>
    </scroll-view>
  </view>
</template>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.scroll-view {
  flex: 1;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
  .symbol {
    font-size: 70%;
  }
  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>
